Chemistry Essay

The world today is heavily dependent on regular supply of fossil fuels from a few nations - this endangers geopolitical and price stability. On the other hand, dependence on hydrogen and fuel cells involves easy and trouble-free access to a large variety of fossil fuels, nuclear energy and renewable energy sources {like wind and solar energy} as and when they become largely obtainable.

Generally speaking endothermic and exothermic reactions account on the comparison of heat gained or lost to the surroundings as the environment helps keep one end of the deal at constant r. (room temperature and pressure) helping in determining which reactions are more active than others.Let us now take a very common example regarding a much general chemistry case that involves either exothermic or endothermic reactions. On significant terms endothermic reactions are rather slow in nature

The poisoning caused by this toxin is both target organ and systematic. The intoxication is target organ since it affects the liver, causing its damage and causing other liver diseases such as liver cirrhosis, hepatic fibrosis and fatty liver disease (Abash, 125). The intoxication is also systematic since it causes a variety of different cancers on the body, affecting different body parts. The poisoning caused by the toxin can also cause the blockage of small arteries, due to blood clots

Hydrogen sources are methane and some bacteria and algae.According to an approximation, each 9/10 atoms in this universe are hydrogen. Hydrogen was discovered by a British fellow, Henry Cavendish in 1766, where he also proved hydrogen to be an integral part of water.The necessary element for fuel cells is hydrogen. Due its abundance and combinations with nearly every compound, hydrogen can be extracted from any of such compounds and has the ability to provide as a source of green energy. The

Short for molecule, Molly is considered to be the purest MDMA, whereas Ecstasy is usually laced with caffeine, methamphetamine or other ingredients. The Drug Enforcement Administration finds that MDMA has a very high potential of risk, that is why the most controlled substance is and is not accepted in medical treatment (“Molly,” Powder or Crystal Form of MDMA, is Popular at Music Festivals).The drug is considered to be empathogenic of the phenethylamine and amphetamine classes. Molly

The Haber process has helped achieve new realms in Agriculture through; increasing food production, helping in the balance of the Nitrogen Cycle (Fullick & Fullick, 2001). However, it has its repercussions as the process requires a lot of energies to realize and the fertilizer produced cause pollution during runoff. It also has a negative effect on soil together with the soil microbes.The Haber Process is a combination of Nitrogen obtained from air and methane derived hydrogen to form ammonia.

Emissions from the incense burning were found to exceed the cigarette smoke emissions, which was higher than the reported environmental tobacco smoke reports that were earlier conducted. Further analysis discovered that charcoal emissions were the main contributor of the high CO and CO2 concentrations recorded. Evaluation on the effects of both experiments suggests incense burning to have more harmful effects to human health than tobacco smoking and it contributes to an even greater percentage

The percentage cold work was calculated by the bellow formula;The work table 1 shows the calculated values for the dimensions of sample copper at each percentage reduction in width. It also includes the cross-sectional area, the percentage cold work as well as the hardness for each percentage reduction.Hardness by definition is ‘a measure of a material’s resistance to localized plastic deformation’ (Callister pp234-318). Deformation of a metal at room temperature makes it harder and its

As such he postulated that there exists triad of elements in nature that the middle one has properties that are an average of the other two. Later on other scientists came to discover other elements which they further would group in to more than sets of three (Royal Society of Chemistry, n.It should also be noted that various attempts had been made to come up with the periodic that we use today. The few elements that were known during the earliest times were investigated by the scientist to

The study of chemistry is a true definition of various discoveries. The scientific discipline focused on studying compounds’ reactions, structure, mechanisms, and properties. The impact of chemistry in the global is based on the presence of chemicals everywhere. Naturally, the world is made of chemicals.